Resubmissions

30-12-2023 23:11

231230-26gg1scea6 10

22-12-2023 04:42

231222-fbzjfsebbr 10

Analysis

  • max time kernel
    432s
  • max time network
    444s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-12-2023 23:11

General

  • Target

    Jigsaw2-b.exe

  • Size

    249KB

  • MD5

    33862bca1fe73d44277e9ad4f0aa81e1

  • SHA1

    e900bf9dc2ad2b18e362c8d42ae8e8ce74fb3ff1

  • SHA256

    053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa

  • SHA512

    08c0ef71dcab39f772abf17b2c714bc89fe2add6fa61f734ea04c05770ad93a68e5fd9caf73d740c3c17dce1ebb0563b0bd82b20fc6a7e508a778bccbbf8384c

  • SSDEEP

    6144:VFVg9EpWQxCKDgqLSV2hIq45K4O4xDL1UnhvHNJ7h0W93MPNdLM7G:/VgGD4KNWViIq4pOOPipHlzsQ7

Malware Config

Signatures

  • Jigsaw Ransomware

    Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

  • Renames multiple (435) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe
    "C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      PID:3636

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe

    Filesize

    249KB

    MD5

    33862bca1fe73d44277e9ad4f0aa81e1

    SHA1

    e900bf9dc2ad2b18e362c8d42ae8e8ce74fb3ff1

    SHA256

    053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa

    SHA512

    08c0ef71dcab39f772abf17b2c714bc89fe2add6fa61f734ea04c05770ad93a68e5fd9caf73d740c3c17dce1ebb0563b0bd82b20fc6a7e508a778bccbbf8384c

  • memory/3192-0-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3192-1-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3192-2-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3192-4-0x0000000002430000-0x0000000002440000-memory.dmp

    Filesize

    64KB

  • memory/3192-3-0x0000000002430000-0x0000000002440000-memory.dmp

    Filesize

    64KB

  • memory/3192-7-0x0000000002430000-0x0000000002440000-memory.dmp

    Filesize

    64KB

  • memory/3192-15-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-13-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-11-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-19-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-21-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-17-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-25-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-23-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-33-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-31-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-39-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-37-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-43-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-45-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-53-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-63-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-61-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-71-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-69-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-67-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-65-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-59-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-57-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-55-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-51-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-49-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-47-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-41-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-166-0x0000000004D10000-0x0000000004D11000-memory.dmp

    Filesize

    4KB

  • memory/3192-35-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-29-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-27-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-9-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-8-0x0000000004CB0000-0x0000000004CE4000-memory.dmp

    Filesize

    208KB

  • memory/3192-182-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3192-187-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3636-179-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3636-183-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3636-186-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-192-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-193-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-189-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3636-347-0x0000000004F70000-0x0000000004F71000-memory.dmp

    Filesize

    4KB

  • memory/3636-349-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3636-351-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/3636-352-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-353-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-356-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-355-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB

  • memory/3636-354-0x00000000020F0000-0x0000000002100000-memory.dmp

    Filesize

    64KB